Question

有没有办法在服务中使用.NET的MSChart（WCF / restful services）？要求是托管服务以生成图表并将图表图像返回给调用应用程序。调用应用程序应调用Web服务方法。没有嵌入MSCHART控件的网页。

Answer 1

您可以在代码中生成图表，然后将图表保存到流中。然后将流返回给调用者。见http://msdn.microsoft.com/en-us/library/dd456181.aspx

Answer 2

VB版..

<WebMethod()> _
       Public Function GetChart(ByVal param1 As String, ByVal width As Integer) As String
          Dim ch As New Charting
          Dim ds As DataSet = blablabla
          Dim page As New Page()
          Dim form As New HtmlForm()
          form.Controls.Add(ch.buildChart(param1, ds, width))
          page.Controls.Add(form)
          Dim textWriter As New IO.StringWriter()
          HttpContext.Current.Server.Execute(page, textWriter, False)
          Dim htmltxt As String = textWriter.ToString
          Return Regex.Replace(htmltxt, "<[/]?(form)[^>]*?>", "", RegexOptions.IgnoreCase)
    End Function

使用像（jquery）：

function GetChart(param1) {
      var params = new Object();
      params.param1 = param1;
      params.width = $(window).width() - 115;
      $.ajax(
      {
         type: "POST",
         data: $.toJSON(params),
         url: "WebService.asmx/GetChart",
         dataType: "json",
         contentType: "application/json",
         complete: function (response) {
         },
         success: function (response) {
        $(divChart).html(response.d);
         .
         .
         .

在服务中的.net环境中使用MSChart

2 个答案: